We report a challenging case of a huge gangrenous prolapsed cervical leiomyoma in a multiparous HIV positive lady. A 37-year-old para 3 lady presented with a progressively increasing irreducible mass protruding out per vaginam, 3 months duration of heavy menses, and symptoms of a urinary tract infection. We performed a vaginal myomectomy and she did well postoperatively. A prolapsed gangrenous cervical leiomyoma is a rare condition with only a few cases reported in the literature. Vaginal myomectomy for this condition can be performed in experienced hands without difficulties.